Nested views properties do not auto update

We want to use several smaller views into a container view (to reuse some views).
We pass along the object through the view by setting the datacontext and we set in to a public property in the child view.
We thought that the binding would auto update: say we change a string value in the container view, we want to see those changes in the childview as well.

This is not happening here. I would provide some XAML/code to show how we do it, but this insert code functionality seems to be broken (in both IE and Chrome).

I do have a small application in which I've reproduced the issue, could that be of any help for you to understand the problem?